Hardware Connection

Before starting GProgrammer, make sure the host (PC) is correctly connected to the target board. You can establish the connection in either SWD mode or UART mode.

• SWD mode

  In SWD mode, users need a J-Link emulator with one end connecting to the host through a Micro USB cable and the other end connecting to SoC pins of the target board through Dupont wire cables.

  

  The table below lists the mapping relations between J-Link emulator pins and SoC pins.

  Table 3 Mapping relations between J-Link emulator pins and SoC pins

  J-Link Emulator Pin	SoC Pin
  VCC	VCC
  GND	GND
  SWDIO	GPIO_1
  SWCLK	GPIO_0

  Note:

  • For target boards that have been integrated with J-Link emulator chips, you can connect the host to the target board directly through a Micro USB cable.
  • For Goodix Starter Kit (SK) Boards, you cannot connect an SK Board to a PC directly via the on-board Micro USB connector (J49) for firmware programming because the integrated ROM upgrade program in the SoC shall be implemented based on a baud rate of 921600, a value which the integrated J-Link emulator chips on the SK Board fails to support.
• UART mode

  In UART mode, users need a USB-to-serial converter with one end connecting to the host through a Micro USB cable and the other end connecting to SoC pins of the target board through Dupont wire cables.

  

  The table below lists the mapping relations between USB-to-serial converter pins and SoC pins.

  Table 4 Mapping relations between USB-to-serial converter pins and SoC pins

  USB-to-Serial Converter Pin	SoC Pin
  VCC	VCC
  GND	GND
  TX	GPIO_1
  RX	GPIO_0
  RTS	CHIP_EN